* viper-util.el (viper-read-key-sequence): fixed so it'll read
fast key sequences in emacs native mode
(viper-events-to-keys): deleted
* viper.el (describe-key, describe-key-briefly): get rid of
viper-events-to-keys.
* ediff-init.el (ediff-has-gutter-support): Steven Turnbull's patch.
* ediff-wind.el (ediff-setup-control-frame): Use
ediff-has-gutter-support.
* ediff-util.el (ediff-dispose-of-variant-according-to-user):
check if buff is alive.
* ediff.el: typo in comment.